The following symbols are generally in accordance
with BS 1553-1...and BS 5070

Different Line Types.

Different Pipe Supports.

Symbols for Fitting and Representations.

Symbols for Valves

v

Symbols for Valve Actuators.

Symbols for Instruments.

Instrument
Indentifiers

Measured Variable

Type of Conditioner

Type of Component

F = Flow

R = Recorder

T = Transmitter

L = Level

I = Indicator

M = Modifier

P = Pressure

C = Controller

E = Element

Q = Quantity

A = Alarm

T = Temperature

Symbols for Process Equipment.

The level of detail for the equipment relates to the
type of schematic being produced. A
Process Flow Sheet will only show the basic level of
information sufficient to show the essential process
flowpaths. An Engineering Line Diagram of
P & ID drawing will show a much more detailed
representation.